Well crap, that blows. I left the place knowing it was shooting less than desired, but just kind of figured that was it.
Your math looks good and all I should expect is 23 feet per second faster than my mathews with equal settings.

One thing I failed to mention is the speeds were obtained using his chrony and comparing them to the speeds of my mathews on my chrony- there could be deviation between the two.

I guess I need to crank it up to 70 and see what it' ll do.

I do think the birth certificates are very cheesy and could be easliy duplicated and doctered by the dealer.
Thanks